Javascript [Electronic resources] : The Definitive Guide (4th Edition) نسخه متنی

Availability

JavaScript 1.0

Synopsis

window.prompt(message, default)

Arguments

message

The plain-text (not HTML) string to be displayed in the dialog box.
It should ask the user to enter the information you want.

default

A string that is displayed as the default input in the dialog box.
Pass the empty string (") to make
prompt( ) display an empty input box.

Returns

The string entered by the user, the empty string if the user did not
enter a string, or null if the user clicked

Cancel .

Description

The prompt( )
method displays the specified message in a
dialog box that also contains a text input field and

OK ,

Clear ,
and

Cancel buttons.
Platform-dependent graphics in the dialog box help indicate to the
user that her input is desired.

If the user clicks the

Cancel
button, prompt( ) returns null.
If the user clicks the

Clear button,
prompt( ) erases any current text in the input
field. If the user clicks the

OK
button, prompt( ) returns the value currently
displayed in the input field.

The dialog box that is displayed by the prompt( )
method is

modal -- that is, it blocks all
user input to the main browser window until the user dismisses the
dialog box by clicking on the

OK or

Cancel buttons. Since this method
returns a value depending on the user's response to the dialog
box, JavaScript execution pauses in the call to prompt(
), and subsequent statements are not executed until the
user responds to the dialog box.

See Also

Window.alert( ), Window.confirm( )